18595430225 has 6 divisors (see below), whose sum is σ = 23058333510. Its totient is φ = 14876344160.

The previous prime is 18595430221. The next prime is 18595430251. The reversal of 18595430225 is 52203459581.

It can be written as a sum of positive squares in 3 ways, for example, as 6540927376 + 12054502849 = 80876^2 + 109793^2 .

It is not a de Polignac number, because 18595430225 - 2² = 18595430221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18595430221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 371908580 + ... + 371908629.

It is an arithmetic number, because the mean of its divisors is an integer number (3843055585).

Almost surely, 2^18595430225 is an apocalyptic number.

It is an amenable number.

18595430225 is a deficient number, since it is larger than the sum of its proper divisors (4462903285).

18595430225 is an equidigital number, since it uses as much as digits as its factorization.

18595430225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743817219 (or 743817214 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 18595430225 in words is "eighteen billion, five hundred ninety-five million, four hundred thirty thousand, two hundred twenty-five".